I am working on my IR, and also have about 15 more hours of those 50 cross countries remaining. To save $, to navigate without GPS, to learn new tricks, to practice CRM, etc. I have been taking along instructors on most of my cross country flights. Obviously instrument training is also conducted dual. So why do I feel guilty about this? Is it ok not to conduct single pilot operations? Am I missing out on something by not venturing out on my own often?